DateElementBase.php
Same filename in other branches
Namespace
Drupal\Core\Datetime\ElementFile
-
core/
lib/ Drupal/ Core/ Datetime/ Element/ DateElementBase.php
View source
<?php
namespace Drupal\Core\Datetime\Element;
use Drupal\Component\Utility\NestedArray;
use Drupal\Core\Datetime\DrupalDateTime;
use Drupal\Core\Render\Element\FormElement;
/**
* Provides a base class for date elements.
*/
abstract class DateElementBase extends FormElement {
/**
* Specifies the start and end year to use as a date range.
*
* Handles a string like -3:+3 or 2001:2010 to describe a dynamic range of
* minimum and maximum years to use in a date selector.
*
* Centers the range around the current year, if any, but expands it far enough
* so it will pick up the year value in the field in case the value in the field
* is outside the initial range.
*
* @param string $string
* A min and max year string like '-3:+1' or '2000:2010' or '2000:+3'.
* @param object $date
* (optional) A date object to test as a default value. Defaults to NULL.
*
* @return array
* A numerically indexed array, containing the minimum and maximum year
* described by this pattern.
*/
protected static function datetimeRangeYears($string, $date = NULL) {
$datetime = new DrupalDateTime();
$this_year = $datetime->format('Y');
[
$min_year,
$max_year,
] = explode(':', $string);
// Valid patterns would be -5:+5, 0:+1, 2008:2010.
$plus_pattern = '@[\\+|\\-][0-9]{1,4}@';
$year_pattern = '@^[0-9]{4}@';
if (!preg_match($year_pattern, $min_year, $matches)) {
if (preg_match($plus_pattern, $min_year, $matches)) {
$min_year = $this_year + $matches[0];
}
else {
$min_year = $this_year;
}
}
if (!preg_match($year_pattern, $max_year, $matches)) {
if (preg_match($plus_pattern, $max_year, $matches)) {
$max_year = $this_year + $matches[0];
}
else {
$max_year = $this_year;
}
}
// We expect the $min year to be less than the $max year. Some custom values
// for -99:+99 might not obey that.
if ($min_year > $max_year) {
$temp = $max_year;
$max_year = $min_year;
$min_year = $temp;
}
// If there is a current value, stretch the range to include it.
$value_year = $date instanceof DrupalDateTime ? $date->format('Y') : '';
if (!empty($value_year)) {
$min_year = min($value_year, $min_year);
$max_year = max($value_year, $max_year);
}
return [
$min_year,
$max_year,
];
}
/**
* Returns the most relevant title of a datetime element.
*
* Since datetime form elements often consist of combined date and time fields
* the element title might not be located on the element itself but on the
* parent container element.
*
* @param array $element
* The element being processed.
* @param array $complete_form
* The complete form structure.
*
* @return string
* The title.
*/
protected static function getElementTitle($element, $complete_form) {
$title = '';
if (!empty($element['#title'])) {
$title = $element['#title'];
}
else {
$parents = $element['#array_parents'];
array_pop($parents);
$parent_element = NestedArray::getValue($complete_form, $parents);
if (!empty($parent_element['#title'])) {
$title = $parent_element['#title'];
}
}
return $title;
}
}
Classes
Title | Deprecated | Summary |
---|---|---|
DateElementBase | Provides a base class for date elements. |
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